From: Logan Capaldo <logancapaldo@...>
Date: 2006-03-04T06:42:00+09:00
Subject: Re: Array comparison returning nil


On Mar 3, 2006, at 4:21 PM, dblack@wobblini.net wrote:

> Hi --
>
> On Sat, 4 Mar 2006, Logan Capaldo wrote:
>
>>
>> On Mar 3, 2006, at 3:33 PM, dblack@wobblini.net wrote:
>>
>>> However:
>>>>> [1,2,nil,3].join("-")
>>> => "1-2--3"
>>> so you'd get those extra -'s in one but not in the other if one but
>>> not the other had nils.
>>
>> I doubt he's displaying the result of the join when doing the  
>> comparison, it would still compare whether or not there are double  
>> dashes
>
> It's not a display thing; it's a <=> or == thing.  If the two arrays
> have unequal numbers of nils, and you join them with "-", the results
> will not be equal.  Actually, I realize now that since he's sorting
> them, he'll never get that far anyway, because this:
>
>   [1,2,3,nil].sort
>
> won't work at all; nor will ["1", "2", "3", nil].sort.
>
> I'll keep my money on the theory that one array contains integers and
> one contains string representations of the same integers :-)
>
>
> David
>

Good point.

> -- 
> David A. Black (dblack@wobblini.net)
> Ruby Power and Light (http://www.rubypowerandlight.com)
>
> "Ruby for Rails" chapters now available
> from Manning Early Access Program! http://www.manning.com/books/black
>